I just got a patch update from the Unofficial Skyrim Patch while i had modded my game.

The character involved was Derkeethus.I was trying to fix the issues where he would run away in combat or hide behind walls an not fight.Then ran some test to see what would work better for him.I found EncClassAlikrMissile to be very good on him due to using weapons an other stats by level 50.

This worked very well an he showed very good progress.So i let him go an started working on fixing other classes.After the patch was installed He has since started behaving AI Nuts! Attacking everyone on site when not in group.

Its like "Oh your leaving well thanks for the group.Now EVERYONE DIES! "

An starts attacking everyone.Can someone tell me how to fix this.The mod was removed an i tried to run it without The Unofficial Skyrim Patch.

It failed I Disabled him an Enabled him.Resurrected him.Nope.He still attacks everyone.So.Some help would be appresiated.Thank you.

You may wish to remove out the changes which make him good in the party, when dismissing him and return him to his vanilla state, and add them in when he joins as a follower.

Most vanilla followers have a lot of script activity going on which joining or quitting via dialog.

This should be in the CK area.